Bruno v



(No Model.)

B.V.NORDBERG.

STEAM PUMP.

Patented Aug. 12, 1890.

Z W Zara/2Z0)- jl lorne a UNIT D STATES PATENT Trier).

BRUNO V. NORDBERG, OF MILIVAUIIEE, \VISCONSIN, ASSIGNOR TO Tl'lE v BRUNONORDBERG COMPANY, OF SAME PLACE.

STEAM-PUMP.

SPECIFICATION forming part of Letters Patent No. 433,994, dated August12, 1890.

Application filed January 13, 1888. Serial No. 260,630. (No model.)

To all whom it may concern".-

Be it known that I, BRUNO V. NORDBERG, of Milwaukee, in the county ofMilwaukee, and in the State of Visconsin, have invented certain new anduseful Improvements in Steam-Pumps; and I do hereby declare that thefollowing is a full, clear, and exact description thereof.

My invention relates to steam-pumps and will be fully describedhereinafter.

In the drawings, Figurel is a side elevation of my invention. Fig. 2 isan end view. Fig. 3 is a section on line 1 2, Fig. 2. Fig. 4. is an endview of a modification. Fig.5 is a side view of the same; and Fig. 6, asection on line 2 3, Fig. 4.

A is a cylinder that is connected with the inlet-chamber B by anintermediate chamber a and a valve 6, and this cylinder is connected toanother larger cylinder C by a pipe D, which also connects bothcylinders with the outlet-chamber E through a valve 6. A rocking valve Fis located in the chamber f of pipe D.

GH are pluugers, one G working in cylinder A through a stuffing-box Iand the other H working in the cylinder 0 through a stuffingbox J. Thestem K of the plungers is controlled by a cross-head L and a rod M, thatslides in lugs m on the side of the two cylinders. The stem (2 of valveF projects through a stuffing-box N in the pipe D, and has fixed on ittwo arms P p, one of which P extends down at right angles to the pipe Dwhen the valve F is closed, and the other 1) extends at an acute angleto the pipe D,and this arm has a horizontal finger q. The lower ends ofthese arms P p hang in the path of a roller 0", that is carried by rodM, so that when the parts are in the position shown in full lines, Fig.1, the roller by lifting on finger q will cause arm 19 to open valve F,which valve will remain open until the forward stroke of the plungercarries roller 0' from beneath the finger q and causes it to strike armP, and when this occurs the arm 1) will be carried to a verticalposition and the valve closed.

The operation of my device is as follows: Imagine the valve F to beopen. Now as the plungers advance from the position shown in Figs. 1 and2 a vacuum will be created in chamber 0 and the fluid will be suckedfrom chamber B, through valve 1), chamber 0, cylinder A, pipe D, andvalve F into chamber 0, and displaced from cylinder A by plunger G untilthe arm P is struck by roller 1" and valve F closed thereby, and thisoccurs just as the plungers have finished their forward strokes. On thebackward stroke, as the valve F is closed when the plungers start, theplunger II will force the fluid from the cylinder C by displacement intooutlet-chamber E through valve 2, and the retiring of plunger G fromcylinder A will cause a vacuum in cylinder A and thus suck from chamberB until the roller 0" lifts arm 19 and thereby opens valve F, when theIiuid will be expelled from the pump to the extent of the difference inarea of plungers G and II.

In the modification shown in Figs. 4:, 5, and 6 I use two cylinders Aand O, differing in diameter from each other, and two correspondingplungers H and G, connected with each other by a walking-beam K, whichlatter is trunnioned in standards L. A short pipe D connects thecylinders A and O, and a valvechamber f is situated in this pipe andcontains a valve F, that is operated by the walking-beam K through astrap 19, one end of which is looped to a pin g on the walkingbeam K,and the other end is wristed to a crank-arm P on the stem d of valve F.

In operation during the first part of the downward stroke of plunger Hthe valve F is closed, and there is no equilibrium. Therefore the pumphas a forcing action, sucking Water into cylinder A and expelling fromcylinder C until the parts are in the position shown in Figs. 5 and 6,when the pin q, acting on the loop of strap 19, will open valve F andestablish equilibrium, which will exist until plunger H completesadownward stroke and plunger G an upward stroke and the plunger H hasmade an upward stroke and the plunger G a downward stroke, during whichtime the pump will take in and expel water in proportion to thedifference in area of the two plungers, forcing action taking place onlyduring that portion of the downward stroke of plunger H in which valve Fis closed. 1

The times at which the valve F will be opened and closed may beregulated by the adjustment of the roller 7' in Fig. 1 and by theshortening or lengthening of the strap 1) in Fig. 5.

I do not propose to confine myself to any particular form of valve orconnection between the two cylinders, as these may .be variedindefinitely without departing from the spirit of my invention.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is

In a steam-pump, the combination, with two cylinders differing indiameter from each other, of two corresponding plungers, inlet andoutlet valves, a pipe connecting the two

